Ohio high-schooler Cassie Sullivan, armed with an M4 carbine, emerges from the woods to raid an abandoned gas station. Upon entering, she hears a male voice calling for help. She finds a wounded man, who points a gun at her, but they each put their weapons down. His other hand is under his jacket and as he takes it out, she sees a glint of metal and kills him. He was holding a Christian cross and the screen cuts to black to show her backstory. A city-sized alien spaceship is circling Earth, containing extraterrestrials referred to as “The Others”. Ten days later, The Others unleash their 1st Wave, an electromagnetic pulse that permanently destroys all electrical power, including vehicles and causing flying aircraft to fall.